I have such a macro attack and effect
he wants the selected damage to be subtracted from the opponent's bar &{template:2Eattack}{{title=@{selected|token_name} USES A @{selected|repeating_weapons_$0_weapsize} SIZED @{selected|repeating_weapons_$0_weaponname} TO ATTACK @{target|token_name}}}{{ac_hit=[[@{selected|ThAC0}-((D20?{ATTACK ROLL MODIFIER|+0})+(@{selected|repeating_weapons_$0_attackadj})+(@{selected|strengthhit}*@{selected|repeating_weapons_$0_strbonus})+(@{selected|dexmissile}*@{selected|repeating_weapons_$0_dexbonus}))]]}}{{dmg_s=[[((@{selected|repeating_weapons_$0_damsm}?{DAMAGE ROLL MODIFIER|+0}))+(@{selected|repeating_weapons_$0_damadj})+(@{selected|strengthdmg}*@{selected|repeating_weapons_$0_strbonus})]]}}{{dmg_l=[[((@{selected|repeating_weapons_$0_daml}?{DAMAGE ROLL MODIFIER|+0}))+(@{selected|repeating_weapons_$0_damadj})+(@{selected|strengthdmg}*@{selected|repeating_weapons_$0_strbonus})]]}}{{crit=RollCrit}} {{fumble=fumble}} !roll20AM --access:player,play|staff !token-mod --set bar3_value|0 statusmarkers|dead /desc It seems that @{selected|token_name} is defeated. /fx splatter-blood @{selected|token_id} @{selected|token_id} /fx glow-blood @{selected|token_id} @{selected|token_id} /fx bubbling-blood @{selected|token_id} @{selected|token_id} it is possible?